Foofie
The Foofie object type eventually evolved into the NinaHand object in the final game, for Nina's grappling functionality.
Chi Chi Grass
The Chi Chi Grass object type eventually evolved into the attachment hooks used for Nina gameplay.
CeilingChiChiGrass
WallChiChiGrass
These types of Chi Chi Grass exist in the final game, with the Ceiling type being invisible, and the Wall type having a different model (the hook).
The only difference in functionality comes from their temporary nature, as after a few seconds of use Foofie would "chew" through the Grass and detach from it by himself.
After another short few seconds the Grass would respawn.
There's an unused additional Ceiling Chi Chi Grass model with a higher quality 128x128 texture, just called ChiChi.
FloorChiChiGrass
A type of Chi Chi Grass that is not in the final game, which attaches to the floor.
There is also an unused model of a "moving" type of Chi Chi Grass in the data, but no known object or functionality. The model is the same as the Floor type's model, but with a higher quality 128x128 texture, therefore it may be another name for the Floor type.
ChiChiMoth / ChiChiMoth_Caged
These two objects use models of the other Chi Chi Grass types.
ChiChiSwitch
This object uses the same Chi Chi Grass object type as the others, and has a unique model.
PayGate
This object, with a dedicated object type PayGate, is a robust and persistent way for Crash to use Foofie to "pay" using Wumpa fruit to unlock whatever is connected to the PayGate.
The PayGate object type can require anywhere between 0 and 1000 Wumpa (default is 50).
If the player has enough Wumpa, the PayGate becomes targetable with Foofie. If the player then attaches to it (like with Chi Chi Grass), the game begins to subtract Wumpa one-by-one until the amount specified by the instance is paid in full.
This process can be paused, and the payment progress persists across dying and reloading the level.
The PayGate object itself is an untextured machine with 1 joint ("charge") and with attachment points for Foofie plus 5 lights (named "POI_charge_01"-05).
It is fully functional and emits particles when in use.